[CH3:1][O:2][CH2:3][O:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][C:20](OCC)=[O:21].[H-].[Al+3].[Li+].[H-].[H-].[H-].S([O-])([O-])(=O)=O.[Na+].[Na+]>O1CCCC1>[CH3:1][O:2][CH2:3][O:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][OH:21]To a solution of 3.0 g of ethyl 16-methoxymethoxyhexadecanoate in 50 ml of tetrahydrofuran was added under ice-cooling 1.5 g of lithium aluminum hydride and the mixture was stirred for one hour. After a saturated aqueous solution of sodium sulfate was added, the insolubles precipitated out were filtered off and distilled under reduced pressure. The residue was chromatographed over a silica gel column to afford the title compound as a colorless oily substance.
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